.teachers_list, .students_list, .timetables_list {
    text-align: center;
    width: 100%;
}

.absences_list, .substitutions_list {
    text-align: center;
}

.teachers_list td, .students_list td, .timetables_list td, .absences_list td, .substitutions_list td {
    border: 1px dotted blue;
    border-radius: 3px;
    border-left: none;
    border-right: none;
}
